Unable to backup a scheduled backup to NAS

I am trying to configure a scheduled backup to NAS with the backup running as a service. When run manually the backup runs fine. When the scheduled service attempts to run the backup it fails with access denied. I assume this is occurring because it is not using the required credentials to access the NAS. Is there any way to force CB to send the login credentials when running as a service? I also tried to setup the schedule as an FTP and when i setup the FTP access i made sure to save the login credentials. When i run the backup manually is always prompts me for the username and password. When the backup attempts to run as a service nothing happens. The log that it creates is blank and the backup isn’t created.